Most Detailed and Accurate Portrait of the U.S. Land Surface
Through the power of computer processing and enhancement, two existing images of the lower 48 states have been brought together in a single digital tapestry. The resulting composite provides a map of the U.S. land surface and shows the ages of its underlying rock formations. The union of topographic texture with the patterns defined by units of geologic time creates a unique digital tapestry of U.S. geological history and events that have shaped the region over the last 2.6 billion years. It includes a booklet describing the features and various terrain on the map. Map scale is 1:3,500,000. Size: 40" x 56".